PROBLEM $2(10$ points$)$

ALL work out problem that ask for boxed answers MUST HAVE boxed answers. Solutions for these problems given without supporting work or boxed answers will NOT be graded and given a score of zero.

A system has the following system of equations

$x^{}+8(x^{}-{}^{})=4u(t)$

$3{}^{}-(x^{}-{}^{})-4(x-)=0$

Find the transfer function $\frac{s}{U}(s).$ BOX YOUR ANSWER.